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Multidimensional hollow SiO_(2)/C nanofibers modified by magnetic nanocrystals for electromagnetic energy conversion and lithium battery storage

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Nano Research 2024年第8期17卷 7301-7314页

作者： Chen Han Qi Zheng Juncheng Jin Jiajia Zhang Wen-Qiang Cao Kun Xiang Min Zhang Mao-Sheng Cao Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology College of Materials and Chemical EngineeringWest Anhui UniversityLu’an 237012China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Department of Physics Beijing Technology and Business UniversityBeijing 100048China

Multifunctional materials are powerful tools to support the advancement of energy conversion *** with prominent electromagnetic and electrochemical properties can realize the conversion of electromagnetic energy and solve the subsequent storage ***,an electrospinning-thermal reduction method is employed to construct ultrafine nickel nanoparticle modified porous SiO_(2)/C(Ni-SiO_(2)/C)hollow nanofibers as promising materials for applications in both electromagnetic wave absorption(EMA)and lithium-ion ***,when used as an EMA material,the reflection loss(RL)of Ni-SiO_(2)/C can reach−47.8 dB at 15.8 GHz with a matching thickness of 2.2 *** excellent microwave absorption performance can be attributed to the enhanced conduction loss,polarization relaxation,synergistic magnetic loss,and preferred impedance matching,which result from multi-component magnetic/dielectric synergy and the unique interconnected multidimensional hollow ***,the electronic conductivity and electrochemical activity of the samples are significantly enhanced due to the uniform distribution of ultrafine Ni nanoparticles in the amorphous SiO_(2)/C ***,the hierarchical hollow porous structure provides sufficient free space for volume change during lithiation/delithiation ***,the Ni-SiO_(2)/C nanocomposite exhibits a high reversible capacity of 917.6 mAh·g^(−1)at 0.1 A·g^(−1).At a high current density of 2 A·g^(−1),a capacity of 563.9 mAh·g^(−1)can be maintained after 300 *** energy conversion-storage device is designed to store waste electromagnetic energy in the form of useful electrical *** work inspires the development of high-performance bifunctional materials.

关键词： Ni-SiO_(2)/C nanofiber electromagnetic absorption lithium-ion storage electrospinning multidimensional structure

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Multiphase cooperation for multilevel strain accommodation in a single-crystalline BiFeO_(3) thin film

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Chinese physics B 2024年第9期33卷 57-66页

作者： Wooseon Choi Bumsu Park Jaejin Hwang Gyeongtak Han Sang-Hyeok Yang Hyeon Jun Lee Sung Su Lee Ji Young Jo Albina Y.Borisevich Hu Young Jeong Sang Ho Oh Jaekwang Lee Young-Min Kim Department of Energy Science Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Samsung Electronics Hwaseong 18448Republic of Korea Department of Physics Pusan National UniversityBusan 46241Republic of Korea LG Energy Solution Daejeon 34122Republic of Korea Department of Materials Science and Engineering Kangwon National UniversityRepublic of Korea School of Materials Science and Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea Center for Nanophase Materials Sciences Oak Ridge National LaboratoryTN 37831USA Graduate School of Semiconductor Materials and Devices Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Department of Energy Engineering KENTECH Institute for Energy Materials and DevicesKorea Institute of Energy Technology(KENTECH)Naju 58330Republic of Korea

The functionalities and diverse metastable phases of multiferroic BiFeO_(3)(BFO)thin films depend on the misfit *** mixed phase-induced strain relaxation in multiphase BFO thin films is well known,it is unclear whether a singlecrystalline BFO thin film can accommodate misfit strain without the involvement of its ***,understanding the strain relaxation behavior is key to elucidating the lattice strain–property *** this study,a correlative strain analysis based on dark-field inline electron holography(DIH)and quantitative scanning transmission electron microscopy(STEM)was performed to reveal the structural mechanism for strain accommodation of a single-crystalline BFO thin *** nanoscale DIH strain analysis results indicated a random combination of multiple strain states that acted as a primary strain relief,forming irregularly strained *** STEM-based bond length measurement of the corresponding strained nanodomains revealed a unique strain accommodation behavior achieved by a statistical combination of multiple modes of distorted structures on the unit-cell *** globally integrated strain for each nanodomain was estimated to be close to􀀀1.5%,irrespective of the nanoscale strain states,which was consistent with the fully strained BFO film on the SrTiO_(3) *** functional theory calculations suggested that strain accommodation by the combination of metastable phases was energetically favored compared to single-phase-mediated *** discovery allows a comprehensive understanding of strain accommodation behavior in ferroelectric oxide films,such as BFO,with various low-symmetry polymorphs.

关键词： BiFeO_(3) scanning transmission electronmicroscopy electron holography multiferroic material strain mapping

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Ultrafast dynamics of chiral phonons in tungsten disulfide

Ultrafast dynamics of chiral phonons in tungsten disulfide

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CLEO: Fundamental science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lin, Tong Chen, Xiaotong Xu, Rui Luo, Jiaming Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

Linearly and circularly polarized phonons in monolayer WS2 are directly excited by resonant infrared pulses. The dynamics of coherent and incoherent chiral phonons are measured by time-resolved Raman spectroscopy and ... 详细信息

ISBN: (纸本)9781957171395

关键词： Time-resolved spectroscopy

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Efficient photon-pair generation in layer-poled lithium niobate nanophotonic waveguides

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Light(science & Applications) 2024年第11期13卷 2847-2856页

作者： Xiaodong Shi Sakthi Sanjeev Mohanraj Veerendra Dhyani Angela Anna Baiju Sihao Wang Jiapeng Sun Lin Zhou Anna Paterova Victor Leong Di Zhu A*STAR Quantum Innovation Centre(Q.InC) Institute of Materials Research and Engineering(IMRE)Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore Department of Physics National University of SingaporeSingapore 117542Singapore Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore Centre for Quantum Technologies National University of SingaporeSingapore 117543Singapore

Integrated photon-pair sources are crucial for scalable photonic quantum ***-film lithium niobate is a promising platform for on-chip photon-pair generation through spontaneous parametric down-conversion(SPDC).However,the device implementation faces practical *** poled lithium niobate(PPLN),despite enabling flexible quasi-phase matching,suffers from poor fabrication reliability and device repeatability,while conventional modal phase matching(MPM)methods yield limited efficiencies due to inadequate mode ***,we introduce a layer-poled lithium niobate(LPLN)nanophotonic waveguide for efficient photon-pair *** leverages layer-wise polarity inversion through electrical poling to break spatial symmetry and significantly enhance nonlinear interactions for MPM,achieving a notable normalized second-harmonic generation(SHG)conversion efficiency of 4615%W^(−1)cm^(−2).Through a cascaded SHG and SPDC process,we demonstrate photon-pair generation with a normalized brightness of 3.1×10^(6)Hz nm^(−1)mW^(−2)in a 3.3 mm long LPLN waveguide,surpassing existing onchip sources under similar operating ***,our LPLN waveguides offer enhanced fabrication reliability and reduced sensitivity to geometric variations and temperature fluctuations compared to PPLN *** expect LPLN to become a promising solution for on-chip nonlinear wavelength conversion and non-classical light generation,with immediate applications in quantum communication,networking,and on-chip photonic quantum information processing.

关键词： waveguide waveguides lithium

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Crystal-phase-controlled PtSn intermetallic nanowires for efficient methanol oxidation

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science China Chemistry 2024年第12期67卷 4142-4148页

作者： Siyu Cao Mengfan Li Zihan Guo Li Gong Yangfan Lu Wenhua Zhang Yu Ni Lei Gao Chao Ma Hongwen Huang College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications Institute of WenzhouZhejiang UniversityWenzhou 325006China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China China Power Engineering Consulting Group Co. LTDBeijing 100120China Shenzhen Research Institute of Hunan University Shenzhen 518055China

Developing highly efficient Pt-based methanol oxidation reaction(MOR)catalysts is pivotal for direct methanol fuel *** engineering of nanomaterials offers a promising strategy to improve their catalytic performance,yet achieving phase modulation in one-dimensional nanowires(NWs)remains a great ***,we report a facile and one-pot synthesis approach for the crystal-phase-controlled Pt-Sn intermetallic nanowires(NWs),realizing the crystal-phases regulation of face-centered cubic Pt_(3)Sn intermetallic NWs(FCC-Pt_(3)Sn INTNWs)and hexagonal close-packed Pt Sn intermetallic NWs(HCP-PtSn INTNWs)by adjusting the amounts of Sn ***,the FCC-Pt_(3)Sn INTNWs exhibit high mass and specific activities of 6.4 A mg_(Pt)^(-1)and 11.8 mA cm^(-2),respectively,surpassing its counterparts,the HCP-PtSn INTNWs and commercial Pt/C *** a 10,000 s durability test,the FCC-Pt_(3)Sn INTNWs still maintain a mass activity of 5.6 A mg_(Pt)^(-1),which is 24.3 times higher than that of commercial Pt/C *** dramatic enhancement of MOR performance is primarily attributed to the phasecontrolled structure and accelerated removal of CO intermediates(CO*).Theoretical calculations and CO stripping experiments demonstrate that the FCC-Pt_(3)Sn INTNWs lower the energy barrier for converting CO*into COOH*by reducing CO*binding and enhancing OH adsorption,thus significantly improving the MOR activity,CO tolerance,and stability.

关键词： Pt-Sn intermetallic nanowires crystal phase methanol oxidation reaction anti-CO poisoning

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Regulation of TiO_(2) nanoarrays on titanium implants for enhanced osteogenic activity and immunomodulation

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Journal of materials science & Technology 2023年第19期150卷 233-244页

作者： Ruoyu Li Hongyu Zhang Xiaohong Yao Bin Tang Paul K Chu Xiangyu Zhang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Department of Occupational Disease Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China

The surface topography of implants plays a major role in osteogenesis and *** this study,three types of TiO_(2) nanoarrays including nanorod arrays with a diameter of 45 nm(TiO_(2)-N),nanorod arrays with a diameter of 60 nm(TiO_(2)-N N),and nanocone arrays(TiO_(2)-NW)are prepared on titanium and the behavior of bone marrow stromal cells(BMSCs)and polarization of macrophages are *** to the planar titanium control,TiO_(2) nanoarrays facilitate osteogenesis of BMSCs and stimulate the pro-healing M2 ***,adhesion,spreading,proliferation,and osteogenic differentiation of BMSCs are more pronounced on TiO_(2)-N N than both TiO_(2)-N and TiO_(2)-***_(2)-NN also produces the best immune microenvironment,while TiO_(2)-NW is more favorable than TiO_(2)-NN from the viewpoint of cell adhesion and spreading of osteoblasts.

关键词： TiO_(2)nanoarrays Osteogenic activity Immunomodulation Hydrothermal treatment

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Pseudocapacitive Heteroatom-Doped Carbon Cathode for Aluminum-Ion Batteries with Ultrahigh Reversible Stability

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Energy & Environmental materials 2024年第5期7卷 150-159页

作者： Jiahui Li Jehad KEl-Demellawi Guan Sheng Jonas Björk Fanshuai Zeng Jie Zhou Xiaxia Liao Junwei Wu Johanna Rosen Xingjun Liu Husam N.Alshareef Shaobo Tu School of Physics and Materials Science Nanchang University999 Xuefu RoadHonggutan DistrictNanchang 330031China School of Materials Science and Engineering and Institute of Materials Genome and Big DataHarbin Institute of TechnologyShenzhen 518055China KAUST Upstream Research Center(KURC) EXPEC-ARCSaudi AramcoThuwal 23955Saudi Arabia Materials Design Division Department of PhysicsChemistry and Biology(IFM)Linköping UniversitySE-58183LinköpingSweden Physical Science and Engineering(PSE)Division King Abdullah University of Science and TechnologyThuwal 23955Saudi Arabia

Aluminum(Al)-ion batteries have emerged as a potential alternative to conventional ion batteries that rely on less abundant and costly materials like ***,given the nascent stage of advancement in Al-ion batteries(AIBs),attaining electrode materials that can leverage both intercalation capacity and structural stability remains ***,we demonstrate a C3N4-derived layered N,S heteroatom-doped carbon,obtained at different pyrolysis temperatures,as a cathode material for AIBs,encompassing the diffusion-controlled intercalation and surface-induced capacity with ultrahigh *** developed layered N,S-doped corbon(N,S-C)cathode,synthesized at 900℃,delivers a specific capacity of 330 mAhg^(-1)with a relatively high coulombic efficiency of~85%after 500 cycles under a current density of 0.5 A g^(-1).Owing to its reinforced adsorption capability and enlarged interlayer spacing by doping N and S heteroatoms,the N,S-C900 cathode demonstrates outstanding energy storage capacity with excellent rate performance(61 mAhg^(-1)at 20 A g^(-1))and ultrahigh reversibility(90 mAhg^(-1)at 5Ag^(-1)after 10000cycles).

关键词： 2D carbon adsorption energy heteroatoms-doping high capacity long cycling life

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Artificial Intelligence-Powered materials science

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Nano-Micro Letters 2025年第6期17卷 212-241页

作者： Xiaopeng Bai Xingcai Zhang Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Department of Mechanical Engineering The University of Hong KongHong Kong 999077People’s Republic of China Department of Physics The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China

The advancement of materials has played a pivotal role in the advancement of human civilization,and the emergence of artificial intelligence(AI)-empowered materials science heralds a new era with substantial potential to tackle the escalating challenges related to energy,environment,and biomedical concerns in a sustainable *** exploration and development of sustainable materials are poised to assume a critical role in attaining technologically advanced solutions that are environmentally friendly,energy-efficient,and conducive to human *** review provides a comprehensive overview of the current scholarly progress in artificial intelligence-powered materials science and its cutting-edge *** anticipate that AI technology will be extensively utilized in material research and development,thereby expediting the growth and implementation of novel *** will serve as a catalyst for materials innovation,and in turn,advancements in materials innovation will further enhance the capabilities of AI and AI-powered materials *** the synergistic collaboration between AI and materials science,we stand to realize a future propelled by advanced AI-powered materials.

关键词： Artificial intelligence Machine learning Sustainable materials Data-driven materials innovation

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Tailoring the microstructure， tensile properties， and creep resistance of additively manufactured Inconel 718 superalloy by post-processing

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Transactions of Nonferrous Metals Society of China 2024年

作者： Sajad Ghaemifar Milad Roostaei Mohammad Reza Zamani Stefan Wurster Hamed Mirzadeh School of Metallurgy and Materials Engineering， College of Engineering， University of Tehran Erich Schmid Institute of Materials Science， Austrian Academy of Sciences Department of Materials Science， Chair of Materials Physics， Montanuniversit?t Leoben

Effects of post-processing heat treatments on the microstructure， aging kinetics， and room/elevated temperature mechanical properties of additively manufactured Inconel 718 superalloy were investigated. Scanning electron microscopy (SEM)， electron backscattered diffraction (EBSD)， and X-ray diffraction (XRD)， as well as hardness， tensile， and creep testing were used for characterization. At temperatures higher than 1100 °C， homogenization treatment resulted in the appearance of equiaxed grains by recrystallization and diminishing the dislocation density. The precipitation activation energy for the homogenized aged condition was obtained as 203 kJ/mol， which was higher than the value of ～160 kJ/mol for the as-built IN718 superalloy. Therefore， direct aging resulted in a faster aging response， which led to a significant improvement in tensile properties， as rationalized by the strengthening mechanisms. Direct aging treatment resulted in a higher elevated-temperature ultimate tensile strength (UTS) as well as the optimum creep life and lowest minimum creep rate in comparison with other heat treating routes， which were attributed to the presence of fine and uniformly dispersed strengthening precipitates in conjunction with the high dislocation density.

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When quantum dots meet blue phase liquid crystal elastomers:visualized full-color and mechanically-switchable circularly polarized luminescence

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Light(science & Applications) 2024年第6期13卷 1210-1220页

作者： Shan Li Yuqi Tang Qingyan Fan Ziyuan Li Xinfang Zhang Jingxia Wang Jinbao Guo Quan Li Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Educationand College of Materials Science and EngineeringBeijing University of Chemical Technology100029BeijingChina Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast UniversityNanjing211189China Materials Science Graduate Program Kent State UniversityKentOH44242USA CAS Key Laboratory of Bio-Inspired Materials and Interfacial Sciences Technical Institute of Physics and ChemistryChinese Academy of Sciences100190BeijingChina

Polymer-based circularly polarized luminescence(CPL)materials with the advantage of diversified structure,easy fabrication,high thermal stability,and tunable properties have garnered considerable ***,adequate and precise tuning over CPL in polymer-based materials remains challenging due to the difficulty in regulating chiral ***,visualized full-color CPL is achieved by doping red,green,and blue quantum dots(QDs)into reconfigurable blue phase liquid crystal elastomers(BPLCEs).In contrast to the CPL signal observed in cholesteric liquid crystal elastomers(CLCEs),the chiral 3D cubic superstructure of BPLCEs induces an opposite CPL ***,this effect is entirely independent of photonic bandgaps(PBGs)and results in a high glum value,even without matching between PBGs and the emission bands of ***,the lattice structure of the BPLCEs can be reversibly switched via mechanical stretching force,inducing on-off switching of the CPL signals,and these variations can be further fixed using dynamic disulfide bonds in the ***,the smart polymer-based CPL systems using the BPLCEs for anti-counterfeiting and information encryption have been demonstrated,suggesting the great potential of the BPLCEs-based CPL active materials.

关键词： circular quantum crystal

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